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U0327 2017 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Quick Answer

The U0327 diagnostic trouble code (DTC) for a 2017 Toyota RAV4 indicates that there has been a communication failure between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). Common causes include Faulty wiring or connections between the main computer system and the VSCM, Malfunctioning VSCM, Issues with the vehicle's main computer system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U0327 2017 Toyota RAV4 indicates Lost Communication with Vehicle Security Control Module.
Common causes
Common causes include Faulty wiring or connections between the main computer system and the VSCM, Malfunctioning VSCM, Issues with the vehicle's main computer system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code U0327 2017 Toyota RAV4 Description

The U0327 diagnostic trouble code (DTC) for a 2017 Toyota RAV4 indicates that there has been a communication failure between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). The VSCM is responsible for managing the security features of the vehicle, such as the alarm system, keyless entry, and immobilizer. When communication is lost with the VSCM, it can lead to issues with the security system's functionality, potentially compromising the safety and security of the vehicle.

OBDII Code U0327 2017 Toyota RAV4 - Lost Communication with Vehicle Security Control Module
U0327 2017 Toyota RAV4 Code - Lost Communication with Vehicle Security Control Module

Common Causes of U0327 2017 Toyota RAV4

  1. Faulty wiring or connections between the main computer system and the VSCM
  2. Malfunctioning VSCM
  3. Issues with the vehicle's main computer system
  4. Water damage or corrosion in the wiring harness
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U0327 2017 Toyota RAV4

  1. Illumination of the security system warning light on the dashboard
  2. Inability to arm or disarm the alarm system
  3. Keyless entry system not working
  4. Engine immobilizer system malfunction
  5. Vehicle not starting due to security system issues

How to Fix U0327 2017 Toyota RAV4

  1. Begin by conducting a thorough inspection of the wiring harness and connections between the main computer system and the VSCM. Repair or replace any damaged wiring or connectors.
  2. Check the VSCM for any signs of malfunction. If necessary, replace the VSCM with a new unit.
  3. Perform a diagnostic scan to reset the communication between the main computer system and the VSCM.
  4. Clear the DTC from the vehicle's onboard computer system using a diagnostic scanner.
  5. Test the security system to ensure that the issue has been resolved and that all functions are working properly.

Cost to Fix U0327 2017 Toyota RAV4

The cost of repairing a U0327 DTC on a 2017 Toyota RAV4 can vary depending on the specific cause of the communication failure. In general, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $200. However, it's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Additionally, the cost of diagnostic time and any additional parts needed can impact the overall repair cost. It's advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate for addressing this issue.

What does this mean?

Tech Notes for U0327 2017 Toyota RAV4

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0327 2017 Toyota RAV4 Code

1. What does the OBDII code U0327 mean for a 2017 Toyota RAV4?

The code U0327 indicates that there is a communication problem between the vehicle's onboard computer and the Vehicle Security Control Module.

2. What are common symptoms of the U0327 code in a 2017 Toyota RAV4?

Common symptoms of the U0327 code include issues with starting the vehicle, security system malfunctions, and warning lights on the dashboard.

3. What are possible causes of the U0327 code in a 2017 Toyota RAV4?

Possible causes of the U0327 code include faulty wiring or connections, a malfunctioning Vehicle Security Control Module, or a problem with the vehicle's onboard computer.

4. How do I diagnose the U0327 code in my 2017 Toyota RAV4?

Diagnosing the U0327 code typically involves using a diagnostic scanner to retrieve the code and then inspecting the wiring, connections, and modules related to the vehicle security system.

5. Can I still drive my 2017 Toyota RAV4 with the U0327 code present?

It is not recommended to drive your vehicle with the U0327 code present, as it can lead to potential security system issues or starting problems.

6. How can I repair the U0327 code in my 2017 Toyota RAV4?

Repairing the U0327 code may involve repairing or replacing damaged wiring, fixing faulty connections, replacing the Vehicle Security Control Module, or reprogramming the vehicle's onboard computer.

7. Is it possible to reset the U0327 code in a 2017 Toyota RAV4 without fixing the underlying issue?

Resetting the U0327 code without addressing the underlying issue will likely result in the code reappearing once the vehicle is driven and the problem persists.

8. Can a DIY enthusiast fix the U0327 code in a 2017 Toyota RAV4?

DIY enthusiasts with knowledge of automotive electronics and wiring may be able to diagnose and repair the U0327 code, but it is recommended to seek professional help for accurate diagnosis and proper repair.

9. How much does it cost to repair the U0327 code in a 2017 Toyota RAV4?

The cost of repairing the U0327 code can vary depending on the root cause of the issue, parts needed for repair, and labor costs. It is best to consult a mechanic for an accurate estimate.

10. How can I prevent the U0327 code from appearing in my 2017 Toyota RAV4?

Regular maintenance, checking and cleaning connections, and addressing any security system issues promptly can help prevent the U0327 code from appearing in your 2017 Toyota RAV4.

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